<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <!-- isChecked 1代表选中 0 代表未选中 -->
      <div class="cart-body">
        <ul class="cart-list" v-for="shop in shopCartList" :key="shop.id">
          <li class="cart-list-con1">
            <input
              type="checkbox"
              name="chk_list"
              :checked="shop.isChecked == 1"
              @change="changeCheck(shop)"
            />
          </li>
          <li class="cart-list-con2">
            <img :src="shop.imgUrl" />
            <div class="item-msg">
              {{ shop.skuName }}
            </div>
          </li>

          <li class="cart-list-con4">
            <span class="price">{{ shop.skuPrice }}</span>
          </li>
          <li class="cart-list-con5">
            <a
              class="mins"
              @click="handleChange('mins',-1,shop)"
              >-</a
            >
            <input
              autocomplete="off"
              type="text"
              :value="shop.skuNum"
              minnum="1"
              class="itxt"
              @change="handleChange('change',$event.target.value*1,shop)"
            />
            <a
              class="plus"
              @click="handleChange('plus',-1,shop)"
              >+</a
            >
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{ shop.skuPrice * shop.skuNum }}</span>
          </li>
          <li class="cart-list-con7">
            <a  class="sindelet" @click="deleteCart(shop.skuId)">删除</a>
            <br />
            <a >移到收藏</a>
          </li>
        </ul>
      </div>
    </div>
    <div class="cart-tool">
      <div class="select-all">
        <input
          class="chooseAll"
          type="checkbox"
          :checked="isChecked && shopCartList.length > 0"
          @change="allChecked"
        />
        <span>全选</span>
      </div>
      <div class="option">
        <a @click="deleteChecked">删除选中的商品</a>
        <a>移到我的关注</a>
        <a>清除下柜商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">已选择 <span>{{choseShop}}</span>件商品</div>
        <div class="sumprice">
          <em>总价(不含运费):</em>
          <i class="summoney">{{ totalPrese }}</i>
        </div>
        <div class="sumbtn">
          <a class="sum-btn" @click="clickGoTrade">结算</a>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import { mapState } from "vuex";
export default {
  name: "ShopCart",
  data(){
     return {
       flagCart:true
     }
  },
  computed: {
    ...mapState({
      shopCartList(store) {
        return store.cart.shopCartList;
      }
    }),
    // 总价
    totalPrese() {
      let totalPrise = 0;
      this.shopCartList.forEach((ele) => {
        // 单价 * 数量  = 总价
        totalPrise += ele.skuPrice * ele.skuNum;
      });
      return totalPrise;
    },
    isChecked() {
      return this.shopCartList.every((ele) => ele.isChecked == 1);
    },
    //已选中的商品
    choseShop(){
      let num = 0
      this.shopCartList.forEach((ele)=>{
           if(ele.isChecked == 1)num++
      })
      return num
    }
  },
  mounted() {
    this.getList();
  },
  methods: {
    //跳转到trade页面
    clickGoTrade(){
        this.$router.push({
          path:'/trade'
        })
    },
    //删除选中的所有商品
    async deleteChecked(){
       try {
           await this.$store.dispatch('reqAllDeleteCart')
           this.getList();
       } catch (error) {
          console.log(error)
       }
    },
    //删除
    async deleteCart(skuId){
       try {
          await this.$store.dispatch('reqDeleteCart',skuId)
          this.getList();
       } catch (error) {
          console.log(error)
       }
    },
    //商品数量变化
    async handleChange(type,num,shop) {
      
      if(!this.flagCart){
        return 
      }
      this.flagCart = false
      /*  设置思路
       type -- 传递不同的方式
       num  -- 变化的值
       shop -- 商品的所有信息
      */
      let id = shop.skuId;
      switch (type) {
        case "plus":
          num = 1;
          break;
        case "mins":
          // 如果大于 1 才可以传给后端 -1; 若小于 1 传0
          num = shop.skuNum > 1 ? -1 : 0;
          break;
        case "change":
          // 如果是非数字情况
          if(isNaN(num)||num < 0){
             num = 0
          }else{
            // 正常情况,还需考虑到用户输入的是小数
             num = parseInt(num) - parseInt(shop.skuNum)
          }
          break;
      }
      // num 是变化的值(整数 是增加 负数 是减少)
      try {
         await this.$store.dispatch('requestShoppingN',{id,num})
        //刷新列表数据
         await this.getList()
         this.flagCart = true
      } catch (error) {
        console.log(error)
      }
    },
    //获取个人购物车数据
    async getList() {
      await this.$store.dispatch("reqShopCartList");
    },
    //单选
    async changeCheck(value) {
      value.isChecked == 1 ? (value.isChecked = 0) : (value.isChecked = 1);
      try {
        await this.$store.dispatch('reqTabChecked',{skuId:value.skuId,isChecked:value.isChecked})
        this.getList();
      } catch (error) {
        console.log(error)
      }
    },
    //全选
    async allChecked(e) {
      try {
        let isChecked =  e.target.checked == 1?'1':'0'
        await this.$store.dispatch('reqAllChecked',isChecked)
        this.getList();
      } catch (error) {
        console.log(error)
      }
    },
  },
};
</script>

<style lang="less" scoped>
.cart {
  width: 1200px;
  margin: 0 auto;

  h4 {
    margin: 9px 0;
    font-size: 14px;
    line-height: 21px;
  }

  .cart-main {
    .cart-th {
      background: #f5f5f5;
      border: 1px solid #ddd;
      padding: 10px;
      overflow: hidden;

      & > div {
        float: left;
      }

      .cart-th1 {
        width: 25%;

        input {
          vertical-align: middle;
        }

        span {
          vertical-align: middle;
        }
      }

      .cart-th2 {
        width: 25%;
      }

      .cart-th3,
      .cart-th4,
      .cart-th5,
      .cart-th6 {
        width: 12.5%;
      }
    }

    .cart-body {
      margin: 15px 0;
      border: 1px solid #ddd;

      .cart-list {
        padding: 10px;
        border-bottom: 1px solid #ddd;
        overflow: hidden;

        & > li {
          float: left;
        }

        .cart-list-con1 {
          width: 15%;
        }

        .cart-list-con2 {
          width: 35%;

          img {
            width: 82px;
            height: 82px;
            float: left;
          }

          .item-msg {
            float: left;
            width: 150px;
            margin: 0 10px;
            line-height: 18px;
          }
        }

        .cart-list-con4 {
          width: 10%;
        }

        .cart-list-con5 {
          width: 17%;

          .mins {
            border: 1px solid #ddd;
            border-right: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }

          input {
            border: 1px solid #ddd;
            width: 40px;
            height: 33px;
            float: left;
            text-align: center;
            font-size: 14px;
          }

          .plus {
            border: 1px solid #ddd;
            border-left: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }
        }

        .cart-list-con6 {
          width: 10%;

          .sum {
            font-size: 16px;
          }
        }

        .cart-list-con7 {
          width: 13%;

          a {
            color: #666;
          }
        }
      }
    }
  }

  .cart-tool {
    overflow: hidden;
    border: 1px solid #ddd;

    .select-all {
      padding: 10px;
      overflow: hidden;
      float: left;

      span {
        vertical-align: middle;
      }

      input {
        vertical-align: middle;
      }
    }

    .option {
      padding: 10px;
      overflow: hidden;
      float: left;

      a {
        float: left;
        padding: 0 10px;
        color: #666;
      }
    }

    .money-box {
      float: right;

      .chosed {
        line-height: 26px;
        float: left;
        padding: 0 10px;
      }

      .sumprice {
        width: 200px;
        line-height: 22px;
        float: left;
        padding: 0 10px;

        .summoney {
          color: #c81623;
          font-size: 16px;
        }
      }

      .sumbtn {
        float: right;

        a {
          display: block;
          position: relative;
          width: 96px;
          height: 52px;
          line-height: 52px;
          color: #fff;
          text-align: center;
          font-size: 18px;
          font-family: "Microsoft YaHei";
          background: #e1251b;
          overflow: hidden;
        }
      }
    }
  }
}
</style>